The
XSetICFocus function allows a client to notify an input method that the
focus window attached to the specified input context has received keyboard
focus. The input method should take action to provide appropriate feedback.
Complete feedback specification is a matter of user interface policy.

Calling
XSetICFocus does not affect the focus window value.

The XUnsetICFocus
function allows a client to notify an input method that the specified
input context has lost the keyboard focus and that no more input is expected
on the focus window attached to that input context. The input method should
take action to provide appropriate feedback. Complete feedback specification
is a matter of user interface policy.

Calling XUnsetICFocus does not affect
the focus window value; the client may still receive events from the input
method that are directed to the focus window.